I had to format my computer the other day but before I did so I backed up all my videos, mp3, photos etc through the Windows Vista system recovery feature onto an external hard drive. I restored them all when I was done formatting but now none of them will play. I get an error message that it can not open the file. They all worked fine before. I have tried VLC, Windows media player and Media Player Classic. When I try to open photos that were backed up it says I do not have permission but I have an administrative account on my comp. Does anyone know what the problem might be?